Typewriting machine



J. LINDBURG TYPEWRITING MACHINE Filed April 30, 1925 2 ShGQtS-ShGGt Af/axwcy/ Patented Oct. 2-, 1928.

, newness-res JOSEPH LINDBUBGFQQF BBOOKLYit, ew Year; less eriton TO nnnnnwoon ELLIOTT FISHER COMPANY, on NEW YORK, N. '55., A oonronarron or DELAWARE.

TYr wBIT Ne Meetings,

Application filed April 3Q, 1925 Serial No. 26,903.

This invent-ion relates. to improvements in sound-proof cabinets for typewriting machines,such, for example, as'shown in the application of George WV. Campbell, Serial No. 510,726, filed October 27 1921 (now' patent'No. 1,566,372, dated December 22, 1925), inwhich the body part of the cabinet 1s made of a single die-casting, the front Wall of said body part having a hole therein through which the keyboard section of the machine protrudes. In'order to place the machine into said cabinet t 1s necessary to raise the cover and then lower the machine 'keyboard first into the cabinet. After the machine is partly lowered, the keyboard section is thrustthrough said openmg. Inexperienced operators are apt to find it awk ward to place the machine into said cabinet. in this manner. I

in order to clean the floor, to remove the ma- Moreover it is necessary,

chine from. said cabinet. I

A feature of the present invention relates to means to enable the machine to be easily inserted into the sound-proof cabinet. To

this end the front wall of the cabinet hinged at its bottom edge to the cabinet floor, so that it may be swung outwardly from the top to lie substantially level, thus permitting the machine to be readily in sci-ted ,or removed from the cabinet. After the machine has been placed in the cabinet, it is merely necessary to swing the front wall upwardly to its closed position, where it may be locked by suitable finger-pieces on the inside'of the cabinet-. V One feature of the invention relates to locking levers mounted on the walls of said cabinet, eachhaving a fingerpiece. Eachlever also provided with a bifurcated end; tojembrace a headed stud on the front plate; The bifurcated end is slightly inclined or cani-shaped to engage behind the head of said stud to draw the front plate inwardly tight against suitable flanges at the-front edges of the side walls of the cabinet to thus 7 to the base by shallow -,enclos1,ng sockets,

promotes vibrations in the machine during tightly close or seal the cabinet.

In order to swing openlthe front Wall, which is hinged at its bottom edge, it will be tirst necessary to move the carriage of the machine to the end of its travel. The

-' moving thev line-space lever ment of parts eliminates the-necessity of re-- previous to swinging down the front wall. f

Another feature ofthe invention to'means for locating the machine in the cabinet. To this end'thereare provided on the floor'of said cabinet cupshaped'locators "in which suitable studs or dowels attached to the frame of themachine maybe inserted. Said loc'ators are also effective, to prevent accidental displacementofthe machine within thecabinet, when" the front plateis swung to its'closed position; said front plate .beingprovided with strips of sound-deadening material,- such ,as felt, to seal the opening attheforward corner post of the machine frame, and through which opening the keyboard section of the machine extends. I

' Stiltanother feature ofthe invention relates to novelmeans forlholdinga detach'a- .ble plate on-the front plate ofthe machine to close the arcuate opening in saidfront plate, which detachable plate inay be removed, when it is desirable to clean the types of the type-bars which ty ranged in an arc atsaid opening.

' The base of the typewriter is usually cast in a'single piece, and the holes in the lower ledge thereof that receive the rubber feet arecored These rough sand-pitted cored, holes materially {ISSIS'QJII retaining the assembled feet in place. In the coring-ofthe holes, their relative locations will vary, and

when it is required to assemble a machinerelates I pesare ar-,

aria.

ing from each machine, because interchangeability between the feet of the machine and the casing-sockets cannot always be -depended upon. Furthermore, the heavy ma chine resting upon four rubber pads anchored turn operations. j

In the present invention 'the feet offlthe machine rest'upon the floor of the casing and become cushioning elementsronly, and the machine 1s accurately and mechanically located withinthe casing by a dowel at each 7 side frame of the base threaded into machine-located holes, and each dowel sets into a socket that is accurately located 11 on the .6 base-board by a templet setting, an under such'production,methods, the interchangeability of machines to a casing can be maintained and the fixed metal dowels of the machine retained in fixed metal sockets in the enclosing casing, promoting a greater rigidadvantages will here- 7 typewriting machine in the sounddeadening casing showing a shutter plate attached to the machine.

" 85 1 Figure 3 is a cross-sectional view in elevation through the1ine33 of Figure 2.

Figure 4' is a perspective view of the shutter platef a Q'F'gure -5 is an end View in elevation of so the sound-deadening casing showing the keyboard extension protruding through the casing. i

Figure 6 is a detail showing the-front wall clamping member in its '0 en position.

66 F igure? is a detail sh wall clamping tion.- a

' Figure 8 isa plan view in cross-section through theline 88 of Figure 5. i

In the present invention there is provideda sound-deadening casing for the purpose of confining the noise arisingfrom the operation of typewritingmachines, and the invention .isl'particularly illustrated in con ;,v nection with an Underwoodstandard typewriter. Said machine comprises a frame 10, a'oarriage-ll borne'by said frame and ar- .,ranged for letter-space travel. upon rails 12 f ffast'to the frame. In order to render the 3' machine operable from thej outside of the casing there is provided at the front there,- of an opening 13 through which the keyboard 14 protrudes, so that the keys l5 may v bezma'nually operated to cause the type- 5 bar-"heads 16 to strike a platenl'? revolubly mounted on the. carriage' r j-The-casing com risesa body part 18 and' a cover 19, rocka ly mounted at the rear sitating the opening of the cover, and at Figure 2 is afront view of the Underfront wall is swung upwardl owing the front member in its closed posithe same time preventing the passage of sound waves to the outside of the casing, there is provided a carriage-return lever 22 and a carriage-release lever 23, both levers ma be moved therealong with the carriage.

ne of the features of this invention relates to means for facilitating the insertion of the machine in the casing and the removal therefrom, so that both the machine and the casing may be cleaned or for any other reason.

downwardly on hinges 28,which. are fast to the floor by means of screws 29 and to the front wall by means of screws 30.

To this end, the front wall of the casing, is swingable forwardly and After placing the machine inthe casing as shown inFigure 1 in which the. front wall is shown in its open position lying in a horizontal position substantially in the same planeas the floor of the casing, the

and is closed as shown in Figure 5. 'The rent wall comprises side plates 31 rigidly connected by a cross-bar 32 forming an integral part thereof, and the whole straddles the keyboard projection, around which the edges 33 of the opening are closely fitted by means of a felt strip 34 fast to the edges of the front wall.

Whenthe front wall is placed in its upstanding position, so that the outer edges 35 bear closely upon the edges 36 ofthe body portion, the front wall maybe secured to the casing by means of hooks 37 rockably mounted on studs 41 fast to the casing. Said hooks are provided with bifurcated ends 39 engaging grooves 40 in studs 38 fast to the front wall. The hooksare oper-,* ated by means of finger-pieces 42 forming i an integral part thereof and are slightly bent inwardly to cam the front wall tightly against the edges 36 of the body part. :In order to further increase the resiliency of the hooks and thus prevent their being accidentally released due to theyibration of the machine, there are provided cars 43 extending inwardly fromithe edges 36 and the hooks areswingably mounted thereon Said ears are comparatively thin and flexible so thatwhen the hooks are pressed into en-' gagement with the studs the. cars will yield.

The front wall is provided with a felt lining 14' at the ends thereof, and,'in order to.

secure thelining thereto, there is provided a plate 1-5 which may be secured by means of lid 7 screws 46. The felt lining overextends the plate to form a border 47 around the opening, which border bears on the frame of the machine. 47,.there'is provided a felt strip 18 at the top of the opening, said strip being glued or otherwise secured to the cross-plate of the front wall. g

In order that the keyboard opening in the front wall may clear the keyboard extension, the opening is made high enough to clear the corner 49 of the keyboard extension, but, in so doing,.due to the construction of the Underwood machine, the sound. wouldleak to the exterior of the casing. In this invention there is provided a cover 51 which has an arcuate lower edge 53 overlapping the arcuate edge 54 of the plate 50. Said cover 51 is resiliently mounted upon the plate 50. by means of a fiat spring 55. The spring 55 has two downwardly-extending prongs 56 engaging the plate 50 at the rear thereof and is secured to the cover by means of screws 57. which incidently serve as means for holding a felt lining 58 fast to the plate.

I the edges 64'overlap the flanges 65 of the body part. In order to render the worksheet visibl'e, thecover is also provided with p a glasssealed window 66 which is placed in the line of vision of the operative.

Referring more particularly to Figure 1, it will be noted that in order to swing the front wall it will be first necessary to move the carriage to the end of its travel as shown in said Figure 1. Then, due to the peculiar shape of the lever 22 which has a down-,

wardly-extending prong 67 the prong will clear the tubular strip 27 of the front wall. i

The machine is located in the casing against accidental shifting, and, to this end,

there is provided a cup-shaped locating de vice 68 fast to the floor of the casing. As shown in Figure 5- the locating device is fastened by screwing the same on a threaded stud 69 which is riveted to the floor at 70.

The locating device 68 is provided with wrench-holes 71 so that the same may be easily separated from the casing.

(lo-operating with the locating device there is provided a dowel 72 secured to the side frame of the machine by screwing its threaded end 73 into threaded holes in the frame and adjustably secured theretoby As a continuation of said border machine.

means of lock-nut 74c or any other locking means. To facilitate the introduction of the dowel into the locating device, the head 7 5 thereof is tapered at the -end' as shown in Figure 5.

To further prevent the" emission of noise to the exterior of the casing, there is provided a comb plate 76 under the keyboard of the machine. Said plate may form an integral part of the floor and isprovided with slots 77 for clearing the keys of the The plate is lined with a layer of felt 78 which is secured thereto by means of the edges 79 which are folded overthe felt. This comb-plate, with its'several slots registering with'the lower keys of-the keyboard, also greatly assists in-the positioning 7 of the machine within the casing as the machine is lowered therein in upright-position after the front wallhas been swungdownward to the position shown in Figure 1 e In order to'prevent damaging-the table upon which the casing stands, a sheet offelt 80 is secured to the floor 20, said feltjinci dentally forming a sound-deadening con-y nection between the casing and the table.

, It will be notedthat the casing-includes a.

walled-in-floor with a hingedcover, and a front wall hinged to the floor to swing over the keyboard of the inachin'eto assume a plane level with the floor;-that, with the cover raised and the frontwall lowered, the

machine may be lowered directly 'into'the easing without interferenceythat, after low-' ering the machine into the casing, theweight of the machine is sustained by the rubber on a feet, and the feet do not becomemachine anchoring elements; that the machine is positioned-relatively to the casing by dowels on the machine engaging within sockets fixed tothe floor of the casing; that the dowels are adjustable up or down and havea free upand--down movement within the sockets, so as not to interfere with the cushioning effect of the rubber feety'and that the-anchorage of the machine by metal interlocks pro? motes a more rigid control for the machine than where therubber'feet of the machine are set within locatingsockets, asheretofore. i

It will be observed-from an inspection of Figures 1, ,2 and 8 that the floor of the casing is only slightly largerthan the bottom of" c j the body of the typewriter, and thatthe side walls flare outwardly and upwardlypso that the upper portion: of the casing-includingthe cover, provides ample room to accommoev J H date the extreme left and'right hand movements of the carriage. This reduced bot,

tom construction makes the casing morecompact, and effects a considerable savlng in casing.

Variations may be'resorted to within scope of the invention, and, portions of the improvements maybe used without others.

1-21) the amount of surface required to support the r thus described my invention, 1

claims a 1. :A sound-deadening casing for a type" writing machine, includingfa floor-section and rear and side walls and a hinged cover therefor,- said casing also including a member hinged to said casingso asto occupy either of two positions, in one of which it is cumbent and lies substantially level with said floor sectio'n, whereby said machine may be low'ered'in upright position into the caseither of two positions, in one of which it is.

cumbent and lies substantiallylevel with 'sai d floor-section, whereby said machine may be lowered in upright position into the casing without obstruction, said member having the form of an open frame surrounding the pro- I jeoting. keyboard extensionof the typewriter when in cumbent position, said member bein wa ly to upright position independently of the keyboard-extension, andforming a front wall for the casing, and means to hold it releasably in'its upright position, said member when in upright position forming the sole frontsection of the casing and extending from the front edge of one side wall to the front edge of theother side wall so as toxopen completely the front of said casing when it is swung forwardly anddownwardly,'to afford easy access tothe encased machine. I a p p 3. In a wun'd-deadening casing for enclosing a typewriting machine having the key board extension thereof projecting outside the casing and an arcuate opening in front nf-the. type-banbasket' of the machine, in combination, a floor-section, rear and side walls, a cover-section, afront wall hinged to thefloor and having an opening to clear thekeyboardextension1n its swinging move? ment, a felt lining border around the open-.

ing tobear against the frame of the machine, and means for closing the arcuate opening in thefront plate of the machine that is detachable therefrom to give access. to the type-bar-basket through the opening in the front wall.

4. In a sound-deadening casing for aetypewriting machine having a frame, a keyalso swingable upwardly and rear-' board-extension projecting therefrom, and a plate fast to the frame and having anarcu-- ate opening in front of the type-:bar-basket of the machine, in combination,a body-part, a cover, a swingably mounted front wall having an opening for the keyboard-eXtension, a felt lining border around the open-. ing and bearing on the frame, and means for closing the arcuate opening in the front plate of the machine, said means-including", a detachable cover havmga lower arcuate edge overlapping the edge of the arcuate opening in said plate, and means for locating and holding the cover on the plate, said last-mentioned means including a flat spring fast to the cover, the spring being provided with prongs to engage the rear of said plate.

writing machine having a frame, a keyboard-extension pro]ecting'thercfrom,and a plate fast to the franie'an'd having an arcu-- ate openlng in front of the type-bar-basket.

of the machine, in combination, a body-part, a cover, a swingably mounted front wall having an opening for the keyboardeXtension, afelt lining border around the} open ing and bearing on the frame, and-.means for closing the arcuate opening in the front plate of the machine, said means including a detachable cover having a'lower arcuate edge overlapping the edge of the arc-hate opening in said plate, and means for locating and holding the cover on the plate,-said last-mentioned means including afiat spring fast tothe cover, thespring being provided with prongs to engage the rearof saidplate, said cover. being provided with a felt lining overlapping the arc-uate opening in the plate. e

6., A sound-deadening casing for a typewriting machine, including a floor-section, rear and side walls, a hingedeover-section,

and a front wall hinged to the floor-section so;:as to be movable downwardly into the plane of the latter to permit the. machine, after the cover has been tilted rearwardly, to be lowered, in upright position, into the cas ingwithout obstruction, said front wall having'an aperture to, permit it to clear the keyboard-extension of the machine when, the latter is in position in the casing as the wall is swung fromv its lowered to its closed position, and a eomb-section'fixed to the forward edge ofthe floor-section and-a11ranged to assist in positioning the machine within .the casing and bridge the space betweenthe-floor of the casing and the bottom offthe key-g board.

' 7. A sound-deadening casing for a typewriting machine, including a floor-section,

rear and'side walls, a hinged cover-section, anda front'wall hinged to" the floor of the casingv so as to be capable of being swung downwardly into the plane of the floor,

5. Ina sound-deadening casing for a typethereby permitting the machine, after 'the cover has been tilted rearwardly, to be lowered into or raised from the casing in up- .right position, withoutobstruction, said front wall having an aperture which underhes the keyboard-extension when the ma chine 1s m posltion 1n the casing and said wall is in lowered position, said aperture permitting the front wall'to clear the keyboardextension as the wall is raised to closed position, and resilient means arranged to hold the front wall in closed position against the body of the casing.

8. A sound-deadening casing for a typewriting machine, including a floor-section,

rear and side walls, a hingedcover-section and a front wall hinged to the floor of the casing so as to be capable of being swung downwardly into the plane of the floor, thereby permitting the machine, after the cover has been tilted rearwardly, to be lowered into or raisedfrom the casing in upright position, without obstruction, said front wall having an aperture which underlies the keyboard-extension when the machine is in position in the casing and said wall IS in lowered position, said aperture permitting the front wall to clear the key-' board-extension as the wall is raised to to form, with the cover-section, an enlarged upper construction to accommodate the carriage in its extreme left and right hand movements, said front wall being hinged to the floor to permit it to be'swung forwardly and downwardly to be substantially level wit-h the latter so that the machine may be lowered in upright position into the casing without obstruction, said wall being apertured to clear the keyboard-extension as it is raised to closed position in front of the casing and arranged toclear the carriagereturn lever when the carriage has been moved to extreme left position, saidfront wall extending from the front edge of one side wall to that of the'other, so as to open completely the front of said casing when; said wall is swung forwardly and downwardly to afford easy access to'the encased machine. 10. A sound-deadening casing for a type- Wv1-iting machine, including a floor-section,

rear and side walls, a cover-section and a front wall hinged to the floor-section so as to be movable forward and downward to be substantially level with the floor-section to permit the lowering of' the machine in upright position into the casing, said front .wall having an aperture so as to straddle the keyboard-extension and clear the latter asit is raised to closed position, the interior surfaces of the edges defining said aperture being lined with a sound-dampening lining arranged to rest against the front surface of the body of the machine when the wall is swung upwardly and rearwardly'to closed position.

11. A detachable cover for the arcuate opening abovethe type-bar basket/of a typewriting machine, including a plate curved at one edge to correspond with the curvature of the basket, and a flat spring attached to the plate and extending approximately to the curved edge thereof and arranged to clamp the front plate of the machine'between itself and said'first-mentioned plate. I

12.111 a sound-deadening casing for a typewrlting machine havlng a frame, a key- 7 board-extension projecting therefrom, and a plate fast to the frame, there being an arcuate opening in front of the. type-bar basket of the machineand above said plate, said casing having afloor-section, rear and side walls and--acover-section, a frontal construction including a front wall hinged to the floor of the casing so as to enable it to be swung downward to permit the machine to be lowered into or raised from the casing in upright position, said wall having an aperture to permit it to clear the keyboard-extension as it is swung to open or closed position, and a cover for said arcuate opening to prevent the escape of sound, through said opening.

JOSEPH LINDBURG. 

